function watermark_show(settings) {

    // 默认设置
    var defaultSettings={
        watermark_txt: "",
        watermark_x : 150,// 水印起始位置x轴坐标
        watermark_y : 50,// 水印起始位置Y轴坐标
        watermark_cols : 6,// 水印列数
        watermark_rows : 8,// 水印行数
        watermark_x_space : 200,// 水印x轴间隔
        watermark_y_space : 60,// 水印y轴间隔
        watermark_color : '#000000',// 水印字体颜色
        watermark_alpha : 0.1,// 水印透明度
        watermark_fontsize : '20px',// 水印字体大小
        watermark_font : '微软雅黑',// 水印字体
        watermark_width : 120,// 水印宽度
        watermark_height : 70,// 水印长度
        watermark_angle : 20// 水印倾斜度数
    };
    // 采用配置项替换默认值，作用类似jquery.extend
    if(arguments.length===1&&typeof arguments[0] ==="object" )
    {
        var src=arguments[0]||{};
        for(key in src)
        {
            if(src[key]&&defaultSettings[key]&&src[key]===defaultSettings[key])
                continue;
            else if(src[key])
                defaultSettings[key]=src[key];
        }
    }
// alert(1);
    var oTemp = document.createDocumentFragment();

    //获取页面最大宽度
    var page_width = Math.max(document.body.scrollWidth,document.body.clientWidth,window.screen.width);

    //获取页面最大长度
    var page_height = Math.max(document.body.scrollHeight,document.body.clientHeight,window.screen.height);
    // alert();

    // 如果将水印列数设置为0，或水印列数设置过大，超过页面最大宽度，则重新计算水印列数和水印x轴间隔
    if (defaultSettings.watermark_cols == 0 || (parseInt(defaultSettings.watermark_x + defaultSettings.watermark_width *defaultSettings.watermark_cols + defaultSettings.watermark_x_space * (defaultSettings.watermark_cols - 1)) > page_width)) {
        defaultSettings.watermark_cols = parseInt((page_width-defaultSettings.watermark_x+defaultSettings.watermark_x_space) / (defaultSettings.watermark_width + defaultSettings.watermark_x_space));
        defaultSettings.watermark_x_space = parseInt((page_width - defaultSettings.watermark_x - defaultSettings.watermark_width * defaultSettings.watermark_cols) / (defaultSettings.watermark_cols - 1));
    }
    // 如果将水印行数设置为0，或水印行数设置过大，超过页面最大长度，则重新计算水印行数和水印y轴间隔
    if (defaultSettings.watermark_rows == 0 || (parseInt(defaultSettings.watermark_y + defaultSettings.watermark_height * defaultSettings.watermark_rows + defaultSettings.watermark_y_space * (defaultSettings.watermark_rows - 1)) > page_height)) {
        defaultSettings.watermark_rows = parseInt((defaultSettings.watermark_y_space + page_height - defaultSettings.watermark_y) / (defaultSettings.watermark_height + defaultSettings.watermark_y_space));
        defaultSettings.watermark_y_space = parseInt(((page_height - defaultSettings.watermark_y) - defaultSettings.watermark_height * defaultSettings.watermark_rows) / (defaultSettings.watermark_rows - 1));
    }
    var x;
    var y;
    // alert(2);
    for (var i = 0; i < defaultSettings.watermark_rows; i++) {
        y = defaultSettings.watermark_y + (defaultSettings.watermark_y_space + defaultSettings.watermark_height) * i;
        for (var j = 0; j < defaultSettings.watermark_cols; j++) {
            x = defaultSettings.watermark_x + (defaultSettings.watermark_width + defaultSettings.watermark_x_space) * j;

            var mask_div = document.createElement('div');
            mask_div.id = 'mask_div' + i + j;
            mask_div.appendChild(document.createTextNode(defaultSettings.watermark_txt));
            // 设置水印div倾斜显示
            mask_div.style.webkitTransform = "rotate(-" + defaultSettings.watermark_angle + "deg)";
            mask_div.style.MozTransform = "rotate(-" + defaultSettings.watermark_angle + "deg)";
            mask_div.style.msTransform = "rotate(-" + defaultSettings.watermark_angle + "deg)";
            mask_div.style.OTransform = "rotate(-" + defaultSettings.watermark_angle + "deg)";
            mask_div.style.transform = "rotate(-" + defaultSettings.watermark_angle + "deg)";
            mask_div.style.visibility = "";
            // mask_div.style.user-select = "none";
            mask_div.style.position = "absolute";
            mask_div.style.left = x + 'px';
            mask_div.style.top = y + 'px';
            mask_div.style.overflow = "hidden";
            mask_div.style.zIndex = "9999";
            // mask_div.style.border="solid #eee 1px";
            mask_div.style.opacity = defaultSettings.watermark_alpha;
            // mask_div.style.filter.alpha.opacity=10
            //alpha(opacity=10)
            mask_div.style.filter="alpha(opacity='10')";
            // mask_div.style.filter.progid="DXImageTransform.Microsoft.Matrix(sizingMethod='auto expand', M11=0.7660444431189777, M12=-0.6427876096865394, M21=0.6427876096865398, M22=0.7660444431189779)";
            mask_div.style.fontSize = defaultSettings.watermark_fontsize;
            mask_div.style.fontFamily = defaultSettings.watermark_font;
            mask_div.style.color = defaultSettings.watermark_color;
            // mask_div.style.progid="DXImageTransform.Microsoft.Matrix(sizingMethod='auto expand', M11=0.866025404, M12=0.5, M21=-0.5, M22=0.866025404)" ;
            // mask_div.style.textAlign = "center";
            //mask_div.style.user-select = "none";
            // mask_div.style.width = defaultSettings.watermark_width + 'px';
            // mask_div.style.height = defaultSettings.watermark_height + 'px';
            // mask_div.style.display = "block";
            //$(mask_div).rotate({angle:45});
            oTemp.appendChild(mask_div);
        };
    };
    // alert(oTemp);
    document.body.appendChild(oTemp);
    // alert(4);
}
